The go ahead and consider that it's time to remove the player and get it on a bench to get inside.
https://www.google.com/search?q=how+to+remove+a+stuck+cassette+tape has a lot more ideas.
Here I went all the way and replaced my player for a modern (?) unit with just CD/DVD/MP3/Bluetooth and such. My car has only 55K miles on it but 18 years old so it wasn't a hard decision.
I have a 1998 Dodge Stratus and the cassette is stuck in the player. I have tried putting a mini screwdriver under it and tried to grasp it with a needlehead pair of pliers, only to fail. Please Help?